You're doing the right thing by trying to keep your grip on the throttle as light as possible. Many new riders give the throttle a "death grip" that quickly results in hand pain or fatigue. Being a new rider, your aim should be to make your inputs as light and smooth as possible and that simply takes practice. Don't get discouraged, just concentrate on rev matching when shifting, hand and foot coordination and especially that light grip on the throttle. Make it a priority every time you ride and it will soon become second nature.